The term "machine parts" refers to individual components or pieces that make up a machine, device or system. These can include anything from gears and motors to sensors and switches, depending on the specific type of machinery being referred to. The purpose of these parts is to work together in order to create movement, perform tasks or carry out functions within the larger mechanism they are part of. In essence, machine parts are what make it possible for machines to operate effectively and efficiently, allowing them to complete their intended tasks with precision and accuracy.